Time to teach you all something... It's called the "Milkshake". It's a big group hug, and everyone jumps up and down and says "Milkshake, milkshake, milkshake" over and over.
Growing up with two siblings and a dad who liked to joke around, we did this a lot.

We'd all hug and dad would break into a milkshake.

is it just me, or does the word Sibling bring to mind a cute lil' goblin-like creature?